CN103066375B - Handheld apparatus and flat plane antenna thereof - Google Patents
Handheld apparatus and flat plane antenna thereof Download PDFInfo
- Publication number
- CN103066375B CN103066375B CN201210025323.7A CN201210025323A CN103066375B CN 103066375 B CN103066375 B CN 103066375B CN 201210025323 A CN201210025323 A CN 201210025323A CN 103066375 B CN103066375 B CN 103066375B
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- radiant body
- feed side
- centre frequency
- radiofrequency signal
- flat plane
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
- H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
- H01Q5/364—Creating multiple current paths
- H01Q5/371—Branching current paths
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
- H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
- Support Of Aerials (AREA)
- Transceivers (AREA)
- Telephone Set Structure (AREA)
Abstract
The invention provides a kind of handheld apparatus and flat plane antenna thereof.This flat plane antenna comprises a radiant body.This radiant body comprises an open end, a short-circuit end, one first feed side and one second feed side.This short-circuit end is coupled to an earth terminal.This first feed side is formed between this open end and this short-circuit end, and is coupled to a radiofrequency signal end.This second feed side is formed between this open end and this first feed side, and is coupled to this first feed side via a transmission line and a switch element.When the non-conducting of this switch element, this radiant body resonates out one first centre frequency, and when this switching elements conductive, and this radiant body resonates out one second centre frequency.
Description
Technical field
The present invention is about a kind of handheld apparatus and flat plane antenna thereof.Specifically, flat plane antenna of the present invention makes its radiant body resonate in two centre frequencies via a transmission line and a switch element.
Background technology
Along with modern is cumulative for the demand of radio communication, handheld apparatus (such as: mobile phone, notebook computer, panel computer etc.) also becomes necessity indispensable in modern's life gradually.In order to meet the dependence of modern for handheld apparatus, handheld apparatus be correlated with dealer there's no one who doesn't or isn't by the design of handheld apparatus towards more humane or be more suitable for the future development of people's demand.
In recent years, because various wireless communication system is pushed out in succession, handheld apparatus has on the market supported the wireless communication system of more than two kinds of communication bands mostly all.Usually different frequency bands is used to carry out Signal transmissions based on different wireless communication systems, there is to reach handheld apparatus the function of multi-band operation, traditional manufacture person installs multiple antenna usually on handheld apparatus, and handheld apparatus is able in response to different wireless communication Dynamic System in different frequency bands.But, based on all factors such as cost, outward appearance, hand-held device inner space, transmission qualities, the method that traditional manufacture person realizes multi-band operation gradually not accept by market.Have the function of multi-band operation to reach handheld apparatus, traditional manufacture person tries to adopt the antenna with multi-band operation, wherein again with the planar inverted-F antenna (planarinverted-Fantenna of the frivolous outward appearance of tool; PIFA) framework attracts most attention.
The known single-frequency flat plane antenna of falling F, only has the current path of radiant body as resonance of one about 1/4 wavelength.In addition, when known single-frequency planar inverted-F antenna will realize multi-band operation, must reach via adding other parasitic antenna element (parasiticantennaelements) and/or forming other branches (branches).So, known planar inverted-F antenna is in order to realize multi-band operation, then must increase the area of radiant body, also increase the size of antenna undoubtedly, if the space of the antenna headroom district (clearancearea) of handheld apparatus and itself inside is large not, more easily have influence on the transmission characteristic of antenna.
In sum, known multi-frequency plane inverse-F antenna at large accept by market, then further must improve following problem: because antenna size increases, make handheld apparatus be difficult to present frivolous; And cannot intactly be placed in headroom district because of antenna, antenna transmission performance is reduced.In addition, known multi-frequency plane inverse-F antenna also cannot flexibly switch between multiple frequency band.
In view of this, how one handheld apparatus and flat plane antenna thereof are provided, with oversize, the disappearance such as transmission performance is not good and cannot flexibly switch between multiple frequency band of effectively improving that known multi-frequency plane antenna has, really for the dealer in this field needs the problem of solution badly.
Summary of the invention
The object of the present invention is to provide a kind of handheld apparatus and flat plane antenna thereof, wherein this flat plane antenna has the advantage that size is little, transmission performance is good and flexibly switch between multiple frequency band.Further, flat plane antenna of the present invention need via adding other parasitic antenna element and/or forming other branches to reach multi-band operation, therefore its size is reduced relative to known multi-frequency plane antenna.On the other hand, due to reducing of antenna size, flat plane antenna of the present invention is easier to intactly be placed in the headroom district of this handheld apparatus, the impact of the electronic component outside headroom district on this flat plane antenna is reduced, and then improves the transmission performance of flat plane antenna.In addition, namely flat plane antenna of the present invention only need allow user flexibly switch between multiple frequency band via transmission line and switch element, therefore more easily designs for known multifrequency antenna handoff technique.
For reaching above-mentioned purpose, disclosed herein a kind of flat plane antenna, this flat plane antenna comprises one first radiant body.This first radiant body comprises an open end, a short-circuit end, one first feed side and one second feed side.This short-circuit end is coupled to an earth terminal.This first feed side is formed between this open end and this short-circuit end, and is coupled to a radiofrequency signal end.This second feed side is formed between this open end and this first feed side, and is coupled to this first feed side via a transmission line and a switch element.When the non-conducting of this switch element, the radiofrequency signal that this radiofrequency signal end exports is fed into this first radiant body by this first feed side, resonates in one first centre frequency to make this first radiant body.When this switching elements conductive, this radiofrequency signal that this radiofrequency signal end exports at least is fed into this first radiant body by this second feed side, resonates in one second centre frequency to make this first radiant body.In addition, this second centre frequency is higher than this first centre frequency.
For reaching above-mentioned purpose, the present invention more discloses a kind of handheld apparatus, and this handheld apparatus comprises a housing, a circuit board and a flat plane antenna.This housing is in order to define an accommodation space.This circuit board is arranged in this accommodation space, and comprises a radiofrequency signal end and an earth terminal.This flat plane antenna is arranged in this accommodation space, and comprises one first radiant body.This first radiant body comprises an open end, a short-circuit end, one first feed side and one second feed side.This short-circuit end is coupled to this earth terminal.This first feed side is formed between this open end and this short-circuit end, and is coupled to this radiofrequency signal end.This second feed side is formed between this open end and this first feed side, and is coupled to this first feed side via a transmission line and a switch element.When the non-conducting of this switch element, the radiofrequency signal that this radiofrequency signal end exports is fed into this first radiant body by this first feed side, resonates in one first centre frequency to make this first radiant body.When this switching elements conductive, this radiofrequency signal that this radiofrequency signal end exports at least is fed into this first radiant body by this second feed side, resonates in one second centre frequency to make this first radiant body.In addition, this second centre frequency is higher than this first centre frequency.
After consulting graphic and embodiments of the present invention, this technical field has knows that the knowledgeable just can understand other objects of the present invention usually, and technological means of the present invention and enforcement aspect.
Accompanying drawing explanation
Fig. 1 is the floor map of the handheld apparatus 1 that of the present invention first implements;
Fig. 2 is the schematic diagram of the reflection coefficient S11 of flat plane antenna 15 under different frequency bands of handheld apparatus 1 of the present invention;
Fig. 3 is the floor map of the handheld apparatus 3 that of the present invention first implements;
Fig. 4 is the floor map of the handheld apparatus 5 that of the present invention second implements;
Fig. 5 is the schematic diagram of the reflection coefficient S11 of flat plane antenna 55 under different frequency bands of handheld apparatus 5 of the present invention; And
Fig. 6 is the floor map of the handheld apparatus 7 that the of the present invention 3rd implements.
Main element symbol description:
1: handheld apparatus
11: housing
111: accommodation space
13: circuit board
131: radiofrequency signal end
133: earth terminal
135: DC control end
137: resistance radio-frequency (RF) component
139: resistance direct current component
15: flat plane antenna
151: the first radiant bodies
151 ': the first radiant body
152: the second radiant bodies
153: open end
154: filter element
155: short-circuit end
157: the first feed sides
159: the second feed sides
17: transmission line
19: switch element
19a: diode element
2: radiofrequency signal
3: handheld apparatus
4: direct current signal
5: handheld apparatus
55: flat plane antenna
7: handheld apparatus
75: flat plane antenna
| S11|: reflection coefficient
Embodiment
Below will explain content of the present invention by embodiment.Must expositor, embodiments of the invention are also not used to restriction the present invention and can must implement in any specific environment as described embodiments, application or particular form.Therefore, the explanation of one embodiment is only explaination object of the present invention, and is not used to limit the present invention, and the scope that this case is asked, be as the criterion with claims.In addition, in following examples and graphic in, the element relevant to non-immediate of the present invention omits and does not illustrate, and graphic below in each interelement size relationship be only and ask easy understanding, be not used to limit actual ratio.
The first embodiment of the present invention is a handheld apparatus 1, and its related description please refer to Fig. 1.Specifically, the floor map of Fig. 1 handheld apparatus 1.As shown in Figure 1, handheld apparatus 1 at least comprises housing 11, circuit board 13 and a flat plane antenna 15.Palpus expositor, handheld apparatus 1 can be the portable electric device that mobile phone, notebook computer, panel computer etc. have wireless transmission function in the present embodiment.In addition, based on the principle simplified is described, other modules in handheld apparatus 1, the module that such as touch control display module, communication module, central processing module, input module, supply module etc. are relevant to non-immediate of the present invention, all omits and does not illustrate in Fig. 1.
Further, housing 11 in order to define an accommodation space 111, using the space of depositing as inner member and the module of handheld apparatus 1.Circuit board 13 is arranged in accommodation space 111, and comprise radiofrequency signal end 131 and an earth terminal 133, wherein radiofrequency signal end 131 is in order to export/to receive a radiofrequency signal 2 of handheld apparatus 1, and earth terminal 133 is as the common ground position of a Relative Zero current potential.In addition, flat plane antenna 15 is configured on a carrier and (is not illustrated in figure), and it is arranged in accommodation space 111, and comprise one first radiant body 151, wherein the first radiant body 151 comprises open end 153, short-circuit end 155,1 first feed side 157 and one second feed side 159.Palpus expositor, the flat plane antenna 15 of the present embodiment has the framework (planarinverted-Fantenna of a planar inverted-F antenna; And flat plane antenna 15 adopts PIFA framework in order to the present embodiment to be described and unrestricted the present invention PIFA).
As shown in Figure 1, the open end 153 of flat plane antenna 15 presents an open circuit kenel, and the short-circuit end 155 of flat plane antenna 15 is because being coupled to the earth terminal 133 of circuit board 13, makes short-circuit end 155 present a short circuit kenel.Further, the first feed side 157 is formed between open end 153 and short-circuit end 155, and is coupled to radiofrequency signal end 131.Second feed side 159 is formed between open end 153 and the first feed side 157, and is coupled to the first feed side 157 via a transmission line 17 and a switch element 19.Must expositor, the open end 153 of the present embodiment, short-circuit end 155, first feed side 157 and the second feed side 159 refer to that it is positioned at the general location on the first radiant body 151 but not refers on its particular location being positioned at the first radiant body 151.In addition; switch element 19 can be the switch of the types such as an automatic switch, an electronic switch, a microelectronic switch, a lock control elements or a diode element; as long as have the switchtype of conducting/close two endpoints couple, all fall within protection scope of the present invention.
Then will illustrate how the flat plane antenna 15 of the present embodiment reaches multi-band operation.When switch element 19 non-conducting, flat plane antenna 15 is equal to a known single-band PIFA antenna.So, according to the physical characteristic of known single-band PIFA antenna, the radiofrequency signal 2 that radiofrequency signal end 131 exports will be fed in the first radiant body 151 by the first feed side 157 by transmission line 17, and follow one first current path (not being illustrated in figure) to flow to the open end 153 of the first radiant body 151, to resonate in one first centre frequency to make the first radiant body 151.Accordingly, when switch element 19 non-conducting, flat plane antenna 15 operates in one first centre frequency, and has one first frequency band.
Further, when switch element 19 conducting, the radiofrequency signal 2 that radiofrequency signal end 131 exports, except being fed in the first radiant body 151 by transmission line 17 by the first feed side 157, is also fed in the first radiant body 151 by the second feed side 159.But, second feed side 159 of flat plane antenna 15 of the present invention is because being coupled to the first feed side 157 via a transmission line 17 and a switch element 19, and radiofrequency signal 2 major part that radiofrequency signal end 131 is exported will be fed in the first radiant body 151 by the second feed side 159.
According to the physical characteristic of known single-band PIFA antenna, radiofrequency signal 2 path that current path can be selected short that radiofrequency signal end 131 exports is as the medium of its main transmission.Due to the open end 153 of the second feed side 159 to the first radiant body 151 of flat plane antenna 15 of the present invention path relative to the open end 153 of the first feed side 157 to the first radiant body 151 current path come short, therefore radiofrequency signal end 131 export radiofrequency signal 2 major part will be fed into the first radiant body 151 via the second feed side 159.On the other hand, due to transmission line 17 and the characteristic of radiofrequency signal end 131 impedance matching, when the radiofrequency signal 2 that radiofrequency signal end 131 exports using transmission line 17 as the loss caused during the medium of transmission by much smaller than using the first radiant body 151 as the loss caused during the medium of transmission.So when the first radiant body 151 is transported in radiofrequency signal 2 tendency to develop that radiofrequency signal end 131 exports, radiofrequency signal 2 can select transmission line 17 as the medium of transmission.
To be fed in the first radiant body 151 by the second feed side 159 through radiofrequency signal 2 major part that radiofrequency signal end 131 exports as shown in the above description, and follow one second current path (not being illustrated in figure) to flow to the open end 153 of the first radiant body 151, to resonate in one second centre frequency to make the first radiant body 151.Accordingly, when switch element 19 conducting, flat plane antenna 15 operates in one second centre frequency, and has one second frequency band, and wherein this second centre frequency is higher than this first centre frequency.Palpus expositor, transmission line 17 also can adopt in other embodiments a coat of metal or not with the transmission line of radiofrequency signal end 131 impedance matching to reach above-mentioned identical function, and the enforcement aspect of the flat plane antenna 15 of the present embodiment is only a preferred embodiment, and be not used to limit the present invention.
Hereby further illustrate with Fig. 2, the reflection coefficient of flat plane antenna 15 under different frequency bands of Fig. 2 handheld apparatus 1 | the schematic diagram of S11|.As shown in Figure 2, when switch element 19 non-conducting, flat plane antenna 15 operates in one first centre frequency, and there is one first frequency band (about 704MHz ~ 746MHz), and when switch element 19 conducting, flat plane antenna 15 operates in one second centre frequency, and has one second frequency band (about 854MHz ~ 894MHz).As can be seen here, whether flat plane antenna 15 of the present invention operates in two centre frequencies via the conducting of switch element 19, and has two frequency bands.In addition, those skilled in the art should understand easily, and flat plane antenna 15 of the present invention via multiple transmission line 17 and multiple switch element 19, flexibly can operate in multiple centre frequency, and have multiple frequency band.
The second embodiment of the present invention is a handheld apparatus 3, and its related description please refer to Fig. 3.Specifically, the floor map of Fig. 3 handheld apparatus 3.Palpus expositor, the handheld apparatus 3 of the present embodiment is identical in essence with the handheld apparatus 1 of the first embodiment, therefore except the element illustrated in the present embodiment, other elements all can be regarded as the corresponding element of the handheld apparatus 1 of the first embodiment.Accordingly, the present embodiment will continue to use portion of element label and the content of the first embodiment, wherein adopt identical label to can be regarded as identical or approximate element, and eliminate the explanation of constructed content.Explanation about clipped can with reference to previous embodiment, and the present embodiment will it is no longer repeated.
As shown in Figure 3, handheld apparatus 3 at least comprises housing 11, circuit board 13 and a flat plane antenna 15.Housing 11 is in order to define an accommodation space 111.Circuit board 13 is arranged in accommodation space 111, and comprises radiofrequency signal end 131, earth terminal 133 and a DC control end 135.In addition, flat plane antenna 15 is also arranged in accommodation space 111, and comprises one first radiant body 151, and wherein the first radiant body 151 comprises open end 153, short-circuit end 155,1 first feed side 157 and one second feed side 159.First feed side 157 is formed between open end 153 and short-circuit end 155, and is coupled to radiofrequency signal end 131.Second feed side 159 is formed between open end 153 and the first feed side 157.
Further, a difference of the handheld apparatus 3 of the present embodiment and the handheld apparatus 1 of the first embodiment is that the second feed side 159 of the first radiant body 151 is coupled to the first feed side 157 via a transmission line 17 and a diode element 19a.In addition; diode element 19a is coupled to the DC control end 135 of circuit board 13 by resistance radio-frequency (RF) component (RFchokeelement) 137; with the conducting state making DC control end 135 control diode element 19a via output one direct current signal 4; and the radiofrequency signal 2 blocking radiofrequency signal end 131 output is directed into DC control end 135, because radiofrequency signal 2 imports, exception does not occur to protect DC control end 135.On the other hand; first feed side 157 of the present embodiment is coupled to radiofrequency signal end 131 by resistance direct current component (DCblockingelement) 139; be directed into radiofrequency signal end 131 to block direct current signal 4, and then there is not exception because direct current signal 4 imports in protection radiofrequency signal end 131.Palpus expositor, resistance radio-frequency (RF) component 137 and the alternative element hindering direct current component 139 handheld apparatus 3, and be not used to limit the present invention.
Specifically, the handheld apparatus 3 of the present embodiment realizes the function of the switch element 19 of the first embodiment handheld apparatus 1 with diode element 19a and DC control end 135.Via the on state characteristic of diode element 19a, the direct current signal 4 exported with DC control end 135 controls the conducting state of diode element 19a.Accordingly, when diode element 19a non-conducting, the flat plane antenna 15 of handheld apparatus 3 operates in one first centre frequency, and there is one first frequency band, and when diode element 19a conducting, the flat plane antenna 15 of handheld apparatus 3 operates in one second centre frequency, and there is one second frequency band, wherein this second centre frequency is higher than this first centre frequency.
Palpus expositor, except above-mentioned explanation, second embodiment also can perform all operations described by previous embodiment and function, art have usually knows the knowledgeable can be directly acquainted with the second embodiment how based on previous embodiment to perform these operation and functions, therefore not repeat.
The third embodiment of the present invention is a handheld apparatus 5, and its related description please refer to Fig. 4.Specifically, the floor map of Fig. 4 handheld apparatus 5.Palpus expositor, the handheld apparatus 5 of the present embodiment is identical in essence with the handheld apparatus 1 of the first embodiment, therefore except the element illustrated in the present embodiment, other elements all can be regarded as the corresponding element of the handheld apparatus 1 of the first embodiment.Accordingly, the present embodiment will continue to use portion of element label and the content of the first embodiment, wherein adopt identical label to can be regarded as identical or approximate element, and eliminate the explanation of constructed content.Explanation about clipped can with reference to previous embodiment, and the present embodiment will it is no longer repeated.
As shown in Figure 4, handheld apparatus 5 at least comprises housing 11, circuit board 13 and a flat plane antenna 55.Housing 11 is in order to define an accommodation space 111.Circuit board 13 is arranged in accommodation space 111, and comprises radiofrequency signal end 131 and an earth terminal 133.In addition, flat plane antenna 55 is also arranged in accommodation space 111, and comprises one first radiant body 151 ', and wherein the first radiant body 151 ' comprises open end 153, short-circuit end 155,1 first feed side 157 and one second feed side 159.First feed side 157 is formed between open end 153 and short-circuit end 155, and is coupled to radiofrequency signal end 131.Second feed side 159 is formed between open end 153 and the first feed side 157, and is coupled to the first feed side 157 via a transmission line 17 and a switch element 19.
Further, one difference of the handheld apparatus 5 of the present embodiment and the handheld apparatus 1 of the first embodiment is that the flat plane antenna 55 of handheld apparatus 5 more comprises one second radiant body 152, second radiant body 152 is coupled to the open end 153 of the first radiant body 151 ' by a filter element 154, one first centre frequency and one the 3rd centre frequency can be operated in when the switch element 19 non-conducting to make flat plane antenna 55, and flat plane antenna 55 can operate in one second centre frequency and one the 4th centre frequency when switch element 19 conducting, wherein first radiant body 151 ' of the present embodiment and the current path total length of the second radiant body 152 are shorter than the current path length of the first radiant body 151 of the first embodiment, and in putting before this, the individual lengths of the first radiant body 151 ' and the second radiant body 152 can adjust arbitrarily.So the present embodiment can under the prerequisite not increasing flat plane antenna 55 size compared to the first embodiment, under the advantage of even reduced plan antenna 55 size again, provide two centre frequencies in addition.It should be noted that, for reaching the Multiband-operation of the present embodiment, first radiant body 151 of the first embodiment can be divided into the first radiant body 151 ' described in the present embodiment and the second radiant body 152 liang of parts, therefore generally speaking, the current path of the present embodiment is still considered as being made up of tailored radiation body, need via adding other element/branches to reach multi-band operation.
Specifically, filter element 154 can be the combination of an elongated transmission line or a passive device, to produce the function of filtration frequencies, make high-frequency signal cannot by filter element 154, and low frequency signal is by filter element 154, to make additionally to produce a high-frequency path and a low frequency path, and be combined with the conducting state of control switch element 19, more can reach the operation of multiband.Accordingly, when switch element 19 non-conducting, the flat plane antenna 55 of handheld apparatus 5 is except operating in one first centre frequency, and there is one first frequency band, more because the filtration frequencies function of the second radiant body 152 and filter element 154, can operate in one the 3rd centre frequency, and have one the 3rd frequency band, wherein the 3rd centre frequency is lower than the first centre frequency.In addition, when switch element 19 conducting, the flat plane antenna 55 of handheld apparatus 5 is except operating in one second centre frequency, and there is one second frequency band, more because the filtration frequencies function of the second radiant body 152 and filter element 154, can operate in one the 4th centre frequency, and have one the 4th frequency band, wherein the 4th centre frequency is lower than the second centre frequency.
Hereby further illustrate with Fig. 5, the reflection coefficient of flat plane antenna 55 under different frequency bands of Fig. 5 handheld apparatus 5 | the schematic diagram of S11|.As shown in Figure 5, when switch element 19 non-conducting, flat plane antenna 55 operates in one first centre frequency and one the 3rd centre frequency, and there is one first frequency band (about 1710MHz ~ 1880MHz) and one the 3rd frequency band (about 698MHz ~ 712MHz), and when switch element 19 conducting, flat plane antenna 55 operates in one second centre frequency and one the 4th centre frequency, and has one second frequency band (about 1880MHz ~ 2170MHz) and one the 4th frequency band (about 712MHz ~ 746MHz).As can be seen here, whether flat plane antenna 55 of the present invention operates in four centre frequencies via the conducting of filter element 154 and switch element 19, and wherein the 3rd and the 4th frequency band more can include the center frequency of operation of LTE.In addition, those skilled in the art should understand easily, and flat plane antenna 55 of the present invention via multiple transmission line 17 and multiple switch element 19, flexibly can operate in multiple centre frequency, and have multiple frequency band.
Palpus expositor, except above-mentioned explanation, 3rd embodiment also can perform all operations described by previous embodiment and function, art have usually knows the knowledgeable can be directly acquainted with the 3rd embodiment how based on previous embodiment to perform these operation and functions, therefore not repeat.
The fourth embodiment of the present invention is a handheld apparatus 7, and its related description please refer to Fig. 6.Specifically, the floor map of Fig. 6 handheld apparatus 7.Palpus expositor, the handheld apparatus 7 of the present embodiment is identical in essence with the handheld apparatus 3 of the second embodiment, therefore except the element illustrated in the present embodiment, other elements all can be regarded as the corresponding element of the handheld apparatus 3 of the second embodiment.Accordingly, the present embodiment will continue to use portion of element label and the content of the second embodiment, wherein adopt identical label to can be regarded as identical or approximate element, and eliminate the explanation of constructed content.Explanation about clipped can with reference to previous embodiment, and the present embodiment will it is no longer repeated.
As shown in Figure 6, handheld apparatus 7 at least comprises housing 11, circuit board 13 and a flat plane antenna 75.Housing 11 is in order to define an accommodation space 111.Circuit board 13 is arranged in accommodation space 111, and comprises radiofrequency signal end 131, earth terminal 133 and a DC control end 135.In addition, flat plane antenna 75 is also arranged in accommodation space 111, and comprises one first radiant body 151 ', and wherein the first radiant body 151 ' comprises open end 153, short-circuit end 155,1 first feed side 157 and one second feed side 159.First feed side 157 is formed between open end 153 and short-circuit end 155, and is coupled to radiofrequency signal end 131.Second feed side 159 is formed between open end 153 and the first feed side 157, and is coupled to the first feed side 157 via a transmission line 17 and a diode element 19a.
Further, one difference of the handheld apparatus 7 of the present embodiment and the handheld apparatus 3 of the second embodiment is that the flat plane antenna 75 of handheld apparatus 7 more comprises one second radiant body 152, second radiant body 152 is coupled to the open end 153 of the first radiant body 151 ' by a filter element 154, one first centre frequency and one the 3rd centre frequency can be operated in when the diode element 19a non-conducting to make flat plane antenna 75, and flat plane antenna 75 can operate in one second centre frequency and one the 4th centre frequency when diode element 19a conducting, wherein the current path total length of the present embodiment first radiant body 151 ' and the second radiant body 152 is shorter than the current path length of the first radiant body 151 of the first embodiment, and in putting before this, the individual lengths of the first radiant body 151 ' and the second radiant body 152 can adjust arbitrarily.So the present embodiment can under the prerequisite not increasing flat plane antenna 75 size compared to the second embodiment, under the advantage of even reduced plan antenna 75 size again, provide two centre frequencies in addition.It should be noted that, for reaching the Multiband-operation of the present embodiment, first radiant body 151 of the first embodiment can be divided into the first radiant body 151 ' described in the present embodiment and the second radiant body 152 liang of parts, therefore generally speaking, the current path of the present embodiment is still considered as being made up of tailored radiation body, need via adding other branches to reach multi-band operation.
Specifically, filter element 154 can be the combination of an elongated transmission line or a passive device, to produce the function of filtration frequencies, make high-frequency signal cannot by filter element 154, and low frequency signal is by filter element 154, to make additionally to produce a high-frequency path and a low frequency path, and be combined with the conducting state controlling diode element 19a, more can reach the operation of multiband.Accordingly, when diode element 19a non-conducting, the flat plane antenna 75 of handheld apparatus 7 is except operating in one first centre frequency, and there is one first frequency band, more because the filtration frequencies function of the second radiant body 152 and filter element 154, one the 3rd centre frequency can be operated in, and there is one the 3rd frequency band, wherein the 3rd centre frequency is lower than the first centre frequency.In addition, when diode element 19a conducting, the flat plane antenna 75 of handheld apparatus 7 is except operating in one second centre frequency, and there is one second frequency band, more because the filtration frequencies function of the second radiant body 152 and filter element 154, can operate in one the 4th centre frequency, and have one the 4th frequency band, wherein the 4th centre frequency is lower than the second centre frequency.
Palpus expositor, except above-mentioned explanation, 4th embodiment also can perform all operations described by previous embodiment and function, art have usually knows the knowledgeable can be directly acquainted with the 4th embodiment how based on previous embodiment to perform these operation and functions, therefore not repeat.
In sum, handheld apparatus of the present invention and flat plane antenna thereof can operate in one first centre frequency and one second centre frequency via a transmission line and a switch element.In addition, if add a filter element and another radiant body, handheld apparatus of the present invention and flat plane antenna thereof can operation bidirectional in one the 3rd centre frequency and one the 4th centre frequency.Specifically, flat plane antenna of the present invention need via adding other parasitic antenna element and/or forming other branches to reach multi-band operation, therefore its size is reduced relative to known multi-frequency plane antenna.On the other hand, due to reducing of antenna size, flat plane antenna of the present invention is easier to intactly put in the headroom district of handheld apparatus, the impact of the electronic component outside headroom district on this flat plane antenna is reduced, and then improves the transmission performance of flat plane antenna.In addition, flat plane antenna of the present invention can allow user flexibly switch between multiple frequency band, therefore more easily designs for known multifrequency antenna handoff technique.Therefore, disappearance that handheld apparatus of the present invention and flat plane antenna thereof have that effect improves that known multi-frequency plane antenna has is oversize, transmission performance is not good and cannot flexibly switch between multiple frequency band etc.
The above embodiments are only used for exemplifying enforcement aspect of the present invention, and explain technical characteristic of the present invention, are not used for limiting protection category of the present invention.Anyly be familiar with this operator and the arrangement of unlabored change or isotropism can all belong to the scope that the present invention advocates, the scope of the present invention should be as the criterion with claims.
Claims (12)
1. a flat plane antenna, comprises:
One first radiant body, comprises:
One open end;
One short-circuit end, is coupled to an earth terminal;
One first feed side, is formed between this open end and this short-circuit end, and is coupled to a radiofrequency signal end; And
One second feed side, is formed between this open end and this first feed side, and is optionally coupled to this first feed side via a transmission line and a switch element;
Wherein, when the non-conducting of this switch element, the radiofrequency signal that this radiofrequency signal end exports is fed into this first radiant body by this first feed side, resonate in one first centre frequency to make this first radiant body, and when this switching elements conductive, this first feed side is coupled with this second feed side, and this radiofrequency signal that this radiofrequency signal end exports is fed into this first radiant body by this first feed side and this second feed side, to make this first radiant body resonate in one second centre frequency, and this second centre frequency is higher than this first centre frequency.
2. flat plane antenna as claimed in claim 1, more comprise one second radiant body, this second radiant body is coupled to this open end of this first radiant body by a filter element, to make this first radiant body and this second radiant body resonate in this first centre frequency and one the 3rd centre frequency when the non-conducting of this switch element, and this first radiant body and this second radiant body resonate in this second centre frequency and one the 4th centre frequency when this switching elements conductive.
3. flat plane antenna as claimed in claim 2, wherein this first centre frequency is higher than the 3rd centre frequency, and this second centre frequency is higher than the 4th centre frequency.
4. flat plane antenna as claimed in claim 1, wherein this switch element is a diode element, and this diode element is coupled to a DC control end, with the conducting state making this DC control end be controlled this diode element by output one direct current signal.
5. flat plane antenna as claimed in claim 4, wherein this diode element is coupled to this DC control end by a resistance radio-frequency (RF) component, and this resistance radio-frequency (RF) component is directed into this DC control end in order to block this radiofrequency signal.
6. flat plane antenna as claimed in claim 5, wherein this first feed side is coupled to this radiofrequency signal end by a resistance direct current component, and this resistance direct current component is directed into this radiofrequency signal end in order to block this direct current signal.
7. a handheld apparatus, comprises:
One housing, in order to define an accommodation space;
One circuit board, is arranged in this accommodation space, comprises a radiofrequency signal end and an earth terminal; And
One flat plane antenna, is arranged in this accommodation space, comprises:
One first radiant body, comprises:
One open end;
One short-circuit end, is coupled to this earth terminal;
One first feed side, is formed between this open end and this short-circuit end, and is coupled to this radiofrequency signal end; And
One second feed side, is formed between this open end and this first feed side, and is optionally coupled to this first feed side via a transmission line and a switch element;
Wherein, when the non-conducting of this switch element, the radiofrequency signal that this radiofrequency signal end exports is fed into this first radiant body by this first feed side, resonate in one first centre frequency to make this first radiant body, and when this switching elements conductive, this first feed side is coupled with this second feed side, and this radiofrequency signal that this radiofrequency signal end exports is fed into this first radiant body by this first feed side and this second feed side, to make this first radiant body resonate in one second centre frequency, and this second centre frequency is higher than this first centre frequency.
8. handheld apparatus as claimed in claim 7, wherein this flat plane antenna more comprises one second radiant body, this second radiant body is coupled to this open end of this first radiant body by a filter element, to make this first radiant body and this second radiant body resonate in this first centre frequency and one the 3rd centre frequency when the non-conducting of this switch element, and this first radiant body and this second radiant body resonate in this second centre frequency and one the 4th centre frequency when this switching elements conductive.
9. handheld apparatus as claimed in claim 8, wherein this first centre frequency is higher than the 3rd centre frequency, and this second centre frequency is higher than the 4th centre frequency.
10. handheld apparatus as claimed in claim 7, wherein this switch element is a diode element, and this diode element is coupled to a DC control end of this circuit board, with the conducting state making this DC control end be controlled this diode element by output one direct current signal.
11. handheld apparatus as claimed in claim 10, wherein this diode element is coupled to this DC control end by a resistance radio-frequency (RF) component, and this resistance radio-frequency (RF) component is directed into this DC control end in order to block this radiofrequency signal.
12. handheld apparatus as claimed in claim 11, wherein this first feed side is coupled to this radiofrequency signal end by a resistance direct current component, and this resistance direct current component is directed into this radiofrequency signal end in order to block this direct current signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/277,539 US9240627B2 (en) | 2011-10-20 | 2011-10-20 | Handheld device and planar antenna thereof |
| US13/277,539 | 2011-10-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103066375A CN103066375A (en) | 2013-04-24 |
| CN103066375B true CN103066375B (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210025323.7A Active CN103066375B (en) | 2011-10-20 | 2012-02-06 | Handheld apparatus and flat plane antenna thereof |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9240627B2 (en) |
| CN (1) | CN103066375B (en) |
| DE (1) | DE102012219263B4 (en) |
| TW (1) | TWI547016B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW201318268A (en) | 2013-05-01 |
| DE102012219263A1 (en) | 2013-07-04 |
| DE102012219263B4 (en) | 2020-03-12 |
| TWI547016B (en) | 2016-08-21 |
| CN103066375A (en) | 2013-04-24 |
| US9240627B2 (en) | 2016-01-19 |
| US20130099996A1 (en) | 2013-04-25 |
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